<template>
  <view class="cart-container" v-if="cart.length != 0">
    <my-address></my-address>
    <!-- 购物车商品列表的标题区域 -->
    <view class="cart-title">
      <!-- 左侧的图标 -->
      <uni-icons type="shop" size="18"></uni-icons>
      <!-- 描述文本 -->
      <text class="cart-title-text">购物车</text>
    </view>
    
    
    <uni-swipe-action>
      <!-- 渲染购物车中的商品信息 -->
      <block v-for="(goods, i) in cart" :key="i">
        <uni-swipe-action-item :right-options="options" @click="swipeItemClickHandler(goods)">
          <my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler" @num-change="numChangeHandler"></my-goods>
        </uni-swipe-action-item>
      </block>
    </uni-swipe-action>
    <!-- 使用自定义的结算组件 -->
    <my-settle></my-settle>
  </view>
  <!-- 空白购物车 -->
  <view class="empyt-cart" v-else>
    <image src="/static/cart_empty@2x.png" class="empty-img"></image>
    <text class="tip-text">空空如也～</text>
  </view>
</template>

<script>
  import badgeMix  from '@/mixins/tabbar-badge.js'
  import { mapState, mapMutations } from 'vuex'
  
  export default {
    mixins: [badgeMix],
    computed: {
      ...mapState('m_cart', ['cart'])
    },
    data() {
      return {
        options: [{
          text: '删除',
          style: {
            backgroundColor: '#C00000'
          }
        }]
      };
    },
    methods: {
      ...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
      //复选框选择事件处理函数
      radioChangeHandler(e) {
        this.updateGoodsState(e)
      },
      numChangeHandler(e) {
        this.updateGoodsCount(e)
      },
      //滑动删除事件处理
      swipeItemClickHandler(goods) {
        this.removeGoodsById(goods)
      }
    }
  }
</script>

<style lang="scss">
.cart-container {
  padding-bottom: 50px;
}
.cart-title {
  height: 40px;
  display: flex;
  align-items: center;//纵向居中对齐
  padding-left: 5px;
  border-bottom: 1px solid #efefef;
  .cart-title-text {
    font-size: 14px;
    margin-left: 10px;
  }
}

.empyt-cart {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 200px;
  .empty-img {
    height: 120px;
    width: 120px;
  }
  .tip-text {
    font-size: 15px; 
    color: gray;
    margin-top: 15px;
  }
}
</style>
